ASR6601 debuging problems (RDDI-DAP Error)


I'm trying to use cheap nanoDAP debuging adapter to flash arm based ASR6601 mcu.

The conection seems to be done correctly, and an arm core seems to be detected

But trying to flash/erase/debug cause RDDI-DAP Error and "Error: Flash Download failed  -  Target DLL has been cancelled".

Anything could be done to fix it?

Thank you in advance.